Request: Sexy Funnel Prank

[lifefits]

There's a prank, were a girl tries to teach her friend a new game. First, she takes a funnel and sticks it in her pants (or panties, if it's a sleepover ), and then she balances a coin on her forehead. Then, she tilts her head forwards, trying to drop the coin down into the funnel. After a few tries, she lets her friend try. However, once her friend has placed the coin on her forehead, she quickly poors a cup of ice cold water into the funnell, soaking her friend's crotch!
There's a video on the net, were some coworkers in an office pull it on some woman, but it's very lame.

This one's a unique request. A really hard one, too.

Anybody got anything on it?
Thanks, yo.